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<br />frontal mid-level stratus present in three storms. Values there ranged from <br />0.05 to 0,,60 mm, depending on the s.torm. The duration of values of this magni- <br />tude rangE~d from. 3-13 hour.s. Supen:ooledwat~r values genarally ranged from <br />0.10 toO..-4Q mm v/ithin the frontal bands and post-frontal orographic' clouds. <br />The post-frontal period lasted from 6-19 hours depending on the storm. Small <br />peaks were present in some cases, suggesting that weak embedded convection cells <br />may have been present. The continual presence of supercooled water in these <br />cloud systems was most likely associated with inefficient precipitation pro- <br />cesses based on the shallow nature of the clouds and the low precipitation <br />rates. Winds had a cross barrier component throughout the lifetime of the <br />storms, which supported the presence and duration of supercooled water. <br /> <br />D. Cutoff low or large amplitude shortwave near 400 N: 6-8 January 1985 <br /> <br />The central Sierra Nevada had been under the influence of a long wave ridge <br />that was located in the eastern Pacific prior to the 6-8 January storm. As the <br />wave pattern progressed eastward, a cutoff low formed at 1400 W longitude and <br />400 ~ latitude. At 1200 on 7 January, the cutoff low had moved eastward to the <br />position shown in Fig. 13. <br /> <br />Figure 14 shows Sheridan rawinsonde time sections from 1200, 7 January 1985 <br />to 0600, 8 January 1985. Supercooled water and precipitation measurements from <br />Kingvale were available from 0000, 7 January to 0900 on 8 January and are pre- <br />sented in Fig. 15. <br /> <br />The satellite picture and the 500 mb height and temperature contours in Fig. <br />13 depict the cutoff flow of the storm. Southerly flow occurred in the pre- <br />frontal I'egion. Within this region, from 0000 to 1500, 7 January, supercooled <br />water was typically 0.40 mm with pE~aks to 0.80 nun. Precipitation during this <br /> <br />20 <br />